athena: Fix a use-after-free case.

athena/wm/window_manager_impl.cc

Index: athena/wm/window_manager_impl.cc
diff --git a/athena/wm/window_manager_impl.cc b/athena/wm/window_manager_impl.cc
index 4d75263d4268a26d480ebc0856b7b987a050fca7..f1243115d42b1465a93e37a1bc647298df755cdd 100644
--- a/athena/wm/window_manager_impl.cc
+++ b/athena/wm/window_manager_impl.cc
@@ -135,6 +135,7 @@ WindowManagerImpl::WindowManagerImpl() {
 
 WindowManagerImpl::~WindowManagerImpl() {
   overview_.reset();
+  split_view_controller_.reset();

[mfomitchev, 2014/08/14 13:10:02]

Ugh. Thanks. Sorry, I should've done the Asan build myself.
Should we destroy the bezel_controller_ explicitly here as well since it holds a
raw pointer to container_ and to split_view_controller?

   mru_window_tracker_.reset();
   if (container_) {
     container_->RemoveObserver(this);